Lock



March 1927' N. LAPPAS LOCK Filed March 22, 1926 v E l I J/ paemed'Ma 9.

. v r 1,631,422; r UNITEDSTATES MEN ;FHCE.

I NIKITAS LAPPAS, oF PEABODY, MAssAoHusE'rtrs. "nocx fi 1 Applicationfiled March 22,- 1926. Serial No.96,578.

The invention relates to improvements inpermutation locking mec'hanism16is mountlocksand more particularly to. keepers thereed on the plate 13and includes'an assembly for,and the'present application discloses a oflooking members 17"ha-ving laterallyprokeeper which is primarilyintended for use jecting arms 18 which may be turned bythe 5 inconnection withhxpermutation' locking controlmembers 19 and 20, sothatall of n1eans, such as that shown by my U. S..Patthem. are in alinementor out of alinement, entNo. 1,571,125 .of January 26, 1926. In asflthecase may be,,and when said arms; are the patented construction, thelocking means alined with feacli other. as shown in .FigureQ, included.a plurality of coaxially mounted being at thatt-ime alined withthejlateral 1 0 locking- -members having laterally projecting portion 12:.ofthe keeper opening,-they may 7 arms,-'all' of s which could passthroughf an passthrough thisopeningyif it is nototlier opening 'in akeeper plate, when said arms. wise obstructed, .so as to permit outwardwere aimed by manipulation of a pairizof swinging of the plate'13andconsequent-disrotatable members. It is the primary object connectionoi the members Aand B, When7 V 1 of the present invention however toprothe 1arms'18 are out of alinement withthe vide a rotatable guardplate mounted at the portion 12 of 'the pening, however and'pref I vinner side of the keeper plate and provided erably outofalinementwitlieach other, the with means wherebygitmay be rotated, said .plate 13 willof course be locked to the guard plate being itself formed witlrankeeper. 8, so thatjthe' members Aand B are 7 a opening which Imust bealined with; the securely, lockedto eachlother. V

opening of said keeper'plate, before the arms The parts so far brieflydescribed, are disof the-locking memberscanpass outwardly closed in mypatent, above referred to permit release of the 1001:. 1 V e to, and noclaim is being madefor themex- I Another object of the invention is'to'xpro-' cept in connection with theimprovements vide exceptionallysimplaand inexpensive, now to be described.

yet efficient means'for mountingand rotat- Rotatably' positioned at theinner side ofing'theguard-plate, 1 .1 the keeper-plate 9, is aguard'plate 21 hav- With'the foregoing inviewfthe inven- 111g an openingwhich preferablycomprises i tion resides in the novel subject matterherea" main portion 22;andj a laterally extending inafter describedandclaimed, the descripportion 23, thESGPOI'tlOIIS being adapted fortion being supplementedby the accom'panyregistration. with; theyopening. portions ing' drawing. e 1112 ofsaid keeper plate 9, when theFigure 1 is a plan View of a locken' bodyguard plate is turned to'theproper position, ing my improvements. t p 4 In fact, theportion22of theguard plate Figure 2 isa longitudinal sectional view opening is alwaysin r'egistratioirwith'the as indicated-by line-'2'2 of'Figure 1..portion 11 .of the keeper plate opening,bnt r Figure 3 is a horizontalsection as indiwhen the device isilockedflhe portion 2310f 'cated byline 3-3 of Figure v2. ii" 1 sald guardplate'openlng is, outtofregistralgure i is a transverse sectional view.- on tion with theportion 12 of said-keeper plate Kline H'of Figure 3.; 1-. r 1 opening."Thus, eventhough' soinehunani Figurei5 iis a top plan view of the guard,thorizedwperson should succeed in learning plate. 1 r 1 y the necessarycombination to aline the arms In the drawings above briefly described, A18 with the portion 12 of the keeper plate and B designate twomemberstobelocked opening,saidarmscould not at that time together.Secured to the-'memberA byfsuitpass outwardly to release'the, look, asthey able fasteners 6 and 7, is a keeper '8,bs'aid would'then beobstructed by the guard plate keeper comprisiiiga plate 9 having alateral- 21.. Hence, in order: to openthe lock, it is 1yprojectingannular flange 10 which bears necessary to also know theproper position against said member A., This plate is at which to setthe guard plate,,so as to ali'ne formed with an opening which preferablythe p0rt10ns'12 and-23 of the openings, as

comprises .a centrally disposed body porseen in Figure 2. Means-are ofcourse protion 11 and a laterally extending portion 12. vided wherebythis guard plate may be *ro-. The numeral 13 designates an outer platetated' from the exterior of the lock. Prefwhich suitably hinged at 14 tothe mem erably this plate is provided'with a laterally .55 vber B, saidplatepreferably having a flange projecting continuou'sflange 24' whichen-' 15 which extends around the keeper 8. A gages the innerfside of theflange 1:0 and is guard by means of which it may be rotated.

and has its inner end supported by an ap- The outer end of thispropriate bearing 28. shaft 27 projects from the flange 1O andisreceived in a notch 29 in the flange of the plate 13, the outerextremity of said shaft being equippedwith' a knob or the like 30 Atapointldiametrically opposite the pin ion 26,1 provide a :roller 31 toengage the edge of the flange 24, so that this roller and thefpiniou26., hold the plate21-in engagement with the keeper plate 9, insuringsmooth rotation of said plate 21. Pr-eferably, the 'roller 31-isprovided with-gear teeth to engage the teeth of the tla-nge24r. Anydesired means may be employed for rotatably supporting this when butIprefer tomake use of a'short shaft 32 havingits outer end mounted in anopening in'the flange 10, while .its inner end is supported :by anappropriate bearing bra ketBi-l, secured. to the inner side of saidflange.

The peripheral portion. of the guardplate 21, is provided with aplurality of num bers or other suitable indicating characters (seeFigures 1 and 5) and these characters are visible one at a time, throughaview opening 34 in the two plates 9 and 13. The legitimate operator ofthe lock knows exactly what character must appear in the opening 351:,in; order torthe portion 23 of the guard plate opening to be inalinement with the portion 12 of the keeper plate ope-ning, and hence byturning the knob until that character appears, he may readily releasethe lock. -Obviously, the, arms" 18 may be alined and properlypositioned by manipulttiono-t the control 'memb'ers' 19 and 20, eitherbefore .or after the guard plate. 1 is set at released position.

Excellent results 7 have been obtained iro n the details disclosed andthey are preferably followed. However,.within the scopeot't heinvention-as claimed, variations may of course be made.

I claim: 7

1-. In a lock,a keeper plate having an opening, an ou ter plateengageable with the outer side of said keeper plate, permutation lockingmeans mounted on said outer plate and including locking member mov ablethrough the opening of the keeper plate, a plate atthe inner side ofsaidi keeper opening through which to insert a locking member, saidkeeper plate having a later- .-.ally projecting continuous flange, aguard plate at the inner side of said keeper plate 7 having an openingwhich is. adapted to be moved either into or out of alinement withthenkeeper plate opening to form an additional lockinghmeans, said guardplate being,.'of circular outline and having its peripheral portion inengagement with and surrounded by saidtflange to be guided in its rotarymovement thereby, and. means for supporting said guard plate rotatingit. :23. In a lock, akeeper plate "having an opening through which alocking member may pass, a said 7 tinuous laterally projecting flange,:a guard plate at the inner sideof said keeper plate having an openingadapted to be moved into or out ofregistra-tion with the keeper plateopening, said guard plate having a laterally projecting continuousflange which engages the inner side of the first named flange andistormed withgear teeth, rotatably mounted members carried-by the firstnamed. flange and engaging the flange of said guard plate torotatablysupport the latter, one of saidrotatably mounted members havinggear-teeth meshing with the teeth of said. guard plate -flange,qand exeposed means connected. With the member for rotating it to, therebyrotate said guard plate. J r

4. In a look, a keeper plate having an opening, an outer plateengageablewith the outer side of said keeper plate, permutation locking.means mounted on said outer plate and including a locking membermovablethrough the opening of the, keeper plate, a

guard plate. at the innerside of said keeper plate movable. either intoobstructing or non-obstructing relation with the pening:thereofi'exposed means whereby said guard plate may be rotated, and.circumferentially spaced indicators on said guardyplate, said keeperplate and said outer plate having a view opening through which saidindicator may be seen.

In testimony whereof I, have hereunto atfixed my signature. I

7 :NIKITAS LAP-PAS.

keeper plate having acontoothed

